Drawbar for tractors



H. Ey CARNI-2R.

DRAWBAR FOR TRACTORS.

APPLICATION FILED MAR. 3. I9I9. RENI-:wsn oc. 6, 1921.

l ,398,4 l 6. I Patented Nov. 29, 1921.

UNITED. STATES.

HENRY E. cnnNEia/or ANAHEIM, camronNrA.

DRAWBAB FOR TRACTDR'S.

Specification of Letters Patent. o Patented Nov.. 29, 1i921..

Application illei March 3, 1919, Serial No. 280,459. Renewe October 6, y1921. Serial No. `505,925.

To all whom it may concern.'

Be it known that l, HENRY E. CARNER, a

citizen of the United States residing at Anaheim, inthe countyv of range, btate. of California, have invented a new and use ful Drawbar for Tractors, ofwhichv the following is a specification. f

This invention pertains to drawbars of the character designed to connect tractors with the implements or vehicles which are drawn by the tractors and an object of the invention is to make provision for so connecting ,the implement or vehicle with the tractor that maximum tractiye effect of the tractor will be produced whenv thentractor is operated.

Another object ofthe invention is to provide a drawbar which will produce a down' ward pull on the front end of the tractor so as to prevent the front wheels of the tractor from rising off the ground.

i'nothel` object is to provide a draw bar i whereby, when the Atractor is turning to the right or left, the resistance of the load toI the pull of the tractor in the turning operation will aid in turning the tractor instead of tending to prevent turning as with many constructions of drawbars now in use.`

@they objects and advantages will appear in the subjoined detailed description. v

The accompanying drawings illustrate the invention:

Figure 1 is a side elevation of a tractor equipped with my improved drawbar, the wheels of the near side of the tractor being omitted and the front axle being shown in` vertical mid section for clearne'ss of illustration. j

Fig. 2 is an enlarged longitudinal mid section of the drawbar, fragments of they front and rear portions of the tractor also being shown.

Fig. 3 is an enlarged fragmental rear elevation of Fig. 1; l

Fig4 is an enlarged plan view of the drawbar, fragments of the front and rear portions of the tractor also being shown, partly in section. j

Fig. 5 is a sectional elevation on line in-X dicated by azi-4&5, Fig. 4.

The tractor is indicated in generalby the character 41 and it is understood that the invention may be used in connection with any tractor of the general type of that shown in Fig. l. In this instancel the tractor lv is of the type known to the trade as the swing vertically so that the front wheels y 6 of the tractor can readily acconnnodate themselves to irregularities of the grounc over which the tractor runs.

The pin 3 also `serves t0 connect the forward portion of the tractor to the upwardly bent forward end 7 of a bar QS, said* upwardly bent end having a perforation 9 through which the pin 3 passes. The front end of the pin 3 is provided withfa head 10 andthe projecting rear end of the pin 3 is provided with a Cotter/pin'll to prevent-withdrawal of the pir/r3. `'lhefg-bar 8 extends rearwardly in the vertical "axial plane of the tractor beneath the crank case` 12 and transmission Lhousing 13 and said bar near its rear end is provided with an upwardly and rearwardly bent portion 14 sthat the rear end of'the bar 8 will lie Vdirectly beneath and close to a rearwardly projecting lug 15 of the drawbar cap 16,

said lug 15, in this instance, being the ordinary or usual drawbar on the Fordson tractor. Bolts 17 pass through holes 18 in lthe lug 15 and also through holes 19 in the rear end portion of the bar 8 so as to rml secure said bar to' the rear end of the tractor. When the rear end of the bal-8 is thus secured to the rear end of the tractor,

from the forwardmost lug 4 so that any pull transmitted to the -bar 8 will not be transmitted by said-bar to the lug'4 but to the bolts 17 and by said bolts to the rear end of the' tractor. v

The' bar is provided approximately at its middle with a pivot in the form of a headed pivot or pin 2O which passes through i a perforation 21 in sai'd bar. The pivot 20 engages a perforation 22 in a rearwardly extendin larm 23 'which is thus pivotally connecte 25 which forms a bearing for the pivot pin The rear end of the arm 23 is "'vprovided to the-bar 8. Thepin 2O also. passes through av perforation 24 in a plate l20, there being a cotter pin 26 through the` .L lower projecting end of` the pin 20 beneathl 'also lthe implement being drawn isla plow andl with an eye 28 whereby the arm 23 may be connected witlr a plow, cultivator or any other agricultural implement or with a vehicle, which is to be drawn hX the tractor. To slidably support the rear end of the arm 23 said rear end may rest upon a transversely extending member in the form of a bar 29, and said member is provided at its ends with stops to limit lateral motion of the arm 23. In this instance said stops .comprise/tubular members 3() through which pass bolts 31, said bolts also passing through perforatipns 32 in. the member 29 and l through other perforations 33 in a second transversely extending member 34 that is also in the form' of a bar; llhe tubes 30 also function as spacing members to 's ace the transverse members 29,. 34 the desired distance from one another., The transverse member 34 rests upon the lug l5 and is provided with perforations 35 to receive the f upper ends of the bolts 17 which bolts thus servo to fasten the transverse member 34 to the rear end of the tractor. verse members 29,34 are provi-'ded with other perforations36 so that, if it be desired to shorten the transverse movement of the arm 23, the bolts v31 may be removed from the perforations 32, 33 and placed selectlvely in -3`0 the perforation 36, the spacing members 30 1 at the same time being placed on the bolts 31 as said bolts farebeing placed in the new x positions.

Assuming that thebar 8 and member 34 vhave been connected to the tractor as above described, and that the implement or vehicle to be' drawn has been connected with the eye 28 of the arm 23,the invention operates as follows: When the tractor is driven straight ahead J over the ground, th'e pull the load comes upon the arm 23; and 1s transmitted to the pin 20 and from said pin to theibar 8. That portion of the bar 8- extending from the pin 20 to the bolts 17 is put in compression and thus it is clear'that the'pull .of the lo/ad is transmitted lto the rear of the tractor, the same asif the load were attached inthe usual way to the 'Iug15, "Ordinarilywith this type of tractor when the load. becomes excessive, for example 'if strikes a liard stretch of grond, the pull "on the lug lftends to swing the rear end of Vthe tractor ldownward around the rear axle 37, thus causing the frontportion of` the tractor to swinv upward around the axle 37. When this new yinvented drawbar is used, however, the downward pull onthe rear end of thearm 23 is more than counterbalanced `-by .the weight of the forward end of the tractor which tends to hold the lforward end of the bar 8'downward, the Weight of the y forward end of the tractor being transmitted through the pin 3y to the bar 8 to prevent 015l any tendency to` raising of the forward end The translthe belts and pivot of the arm 23. It is understood that the pin 2() can be positioned nearer the front end or nearer the rear end of the bar 8. The nearer the rear end the pin 20 is positioned, the lessJ transmitted by the' arm 23 to a point subl- 80 stantially midway between Athe front and rear saxles so that the tractor will tend to swing horizontally in a circular path-about the pin 20. Thus it is clear that the pin 20 should be located forwardly of the axle 37. The stops 30 prevent the arm 23 from swinging too far away from the axis of draft of the tractor.

Itis understoodthat the invention is nt .limited in its broader phasesto the exact details .of construction described above and' shown inthe accompanying drawings, but that such changes andmodifications are included as`lie within the spirit and scopeof the appended claims.

I-clail:

1. The combination with the front axle pivot pin of a tractor, of a bar pivoted to the i tractor by said pivotvp'in, means connecting the rear end of the bar with the rear end of the tractor, and a)arm ivoted tothe bar at `apoint-forwardly of e rear axle of the tractor.. L 'p 2y. The combination with a tractor. having .a front axle pivot pin and an ordinary drawbar, of a barengaging the Apivot pin, bolts connectin tle bar with the ordinary ',drawbxar, and an arm pvoted tothe bar between-the bolts and pivot pin.

3. -The combination with a tractor having a front axleV pivot pin and an ordinaryr drawbar, of a bar engaging the pivot'pin, bolts connecting the bar with the ordinary drawbar, an arm pivoted tothe bar between pin, a bar extending 11i transversely beneath the ear end of the arm and means conjunction with the bolts for connecting'l the transversely extending bar with the ordinary drawbar.

4. A draw bar construction for tractors comprising means for supporting a stud'beneath thel forward end of the transmission f `case ofthe tractor, means forbracing the stud, and' a bar pivotally connected. to the stud and extending backwardly beyond the S rear-axle. A

, 5. draw bar construction for tractors comprlsing means for sup orting a stud beneath the forward end ofthe transmission case of the tractor so that the stud will extend downwardly at a point in 4front of the rear axle, and a bar connected to the stud and adapted for connection to a farm implement.

6. A draw bar construction for tractors comprising a cross bar adapted to be mounted behind and below the rear axle, means for supporting a stud beneath the forward end of the transmission case of the tractor so that the Stud will extend downwardly at a point in front of and below the rear axle, a brace connecting the stud to the crossbar, and a bar pivotally mounted upon the stud and extending backwardly beyond the rear axle.

7. A draw bar construction for tractors comprising a bar having an upwardly bent forward end provided with a perforation i of the bolt holes in the lug of the drawbar cap of the tractor, a stud projecting downwardly from near the middle of the bar, and a second bar pivotally mounted on the stud anl extending backwardly beyond the rear ax e.

Signed at Los Angeles, California, this 21st day of February, 1919.

HENRY E. CARNEB.

Witnesses GEORGE H. HILES, L. BELLE WEAVER. 

